[svn-r6387] Purpose:

    Bug Fix

Description:
    Metadata cache in parallel I/O can cause hangs in applications which
    perform independent I/O on chunked datasets, because the metadata cache
    can attempt to flush out dirty metadata from only a single process, instead
    of collectively from all processes.

Solution:
    Pass a dataset transfer property list down from every API function which
    could possibly trigger metadata I/O.

    Then, split the metadata cache into two sets of entries to allow dirty
    metadata to be set aside when a hash table collision occurs during
    independent I/O.

Platforms tested:
    Tested h5committest {arabica (fortran), eirene (fortran, C++)
        modi4 (parallel, fortran)}

    FreeBSD 4.7 (sleipnir) serial & parallel

Misc. update:
    Updated release_docs/RELEASE

1 files changed, 4 insertions, 4 deletions

diff --git a/src/H5Olayout.c b/src/H5Olayout.c
index 96340d1..1b353c1 100644
--- a/src/H5Olayout.c
+++ b/src/H5Olayout.c
@@ -15,13 +15,13 @@
 #include "H5Oprivate.h"
 
 /* PRIVATE PROTOTYPES */
-static void *H5O_layout_decode(H5F_t *f, const uint8_t *p, H5O_shared_t *sh);
+static void *H5O_layout_decode(H5F_t *f, hid_t dxpl_id, const uint8_t *p, H5O_shared_t *sh);
 static herr_t H5O_layout_encode(H5F_t *f, uint8_t *p, const void *_mesg);
 static void *H5O_layout_copy(const void *_mesg, void *_dest);
 static size_t H5O_layout_size(H5F_t *f, const void *_mesg);
 static herr_t H5O_layout_reset (void *_mesg);
 static herr_t H5O_layout_free (void *_mesg);
-static herr_t H5O_layout_debug(H5F_t *f, const void *_mesg, FILE * stream,
+static herr_t H5O_layout_debug(H5F_t *f, hid_t dxpl_id, const void *_mesg, FILE * stream,
 			       int indent, int fwidth);
 
 /* This message derives from H5O */
@@ -78,7 +78,7 @@ H5FL_DEFINE(H5O_layout_t);
  *-------------------------------------------------------------------------
  */
 static void *
-H5O_layout_decode(H5F_t *f, const uint8_t *p, H5O_shared_t UNUSED *sh)
+H5O_layout_decode(H5F_t *f, hid_t dxpl_id, const uint8_t *p, H5O_shared_t UNUSED *sh)
 {
     H5O_layout_t           *mesg = NULL;
     int                    version;
@@ -445,7 +445,7 @@ done:
  *-------------------------------------------------------------------------
  */
 static herr_t
-H5O_layout_debug(H5F_t UNUSED *f, const void *_mesg, FILE * stream,
+H5O_layout_debug(H5F_t UNUSED *f, hid_t dxpl_id, const void *_mesg, FILE * stream,
 		 int indent, int fwidth)
 {
     const H5O_layout_t     *mesg = (const H5O_layout_t *) _mesg;